Traverse mechanism for yarnwinding machines



y 1940- D. FINLAYSON TRAVERSE MECHANISM FOR YARN-WINDING MACHINES Filed Sept. 11, 1937 2 Sheets-Sheet l TRAVERSE MECHANISM FOR YARN-WINDING MACHINES Filed Sept. 11, 1957 2 Sheets-Sheet 2- ll ll 1I II n I In Patented May 14, 1940 UNITED STATES PATENT OFFICE TRAVERSE MECHANISM FOR YARN- wmpmo MACHINES Application September 11, 1937, Serial No. 163,428 In Great Britain September 24, 1936 4 Claims.

The present invention relates to traverse mechanism for yarn-winding machines and is concerned more particularly with yarn winding apparatus of the type adapted to produce crosswound packages of yarn, such as cheeses, cones and like packages, the object of the invention being to provide simple and effective means for winding such packages with self-supporting ends.

In the yam-winding machine according to the invention, the traverse mechanism comprises a traverse rod pivoted so as to be capable of oscillation lengthwise of the take-up package, and having pivotally mounted thereon an arm bearing a yarn guide and capable of swinging towards F1 or away from the plane in which the rod oscillates, while partaking of the oscillating movement of the rod. The guide arm bears against the surface of the package, so that as the package diameter increases, the guide arm moves r. progressively about its pivot away from the said plane and the effective length between the yarn guide and the centre of oscillation of the rod decreases.

At the commencement of the winding operation the guide arm bears against the surface of the package support, and the oscillation of the rod moves the yarn guide from end to end of the support. As the thickness of the yarn on the package increases, however, the guide arm resting thereon is swung about its pivot on the oscillating rod, with the result that the extent of traverse of the yarn guide is' progressively lessened. The progressive lessening of the extent of the movement of the yarn guide causes each successive layer of yarn laid on the package to be slightly less in length than the preceding layer with the result that'a package having tapering or frustro-conical ends is produced.

The degree of taper of the ends of a package can be varied as desired by varying the distance between the pivot about which the rod oscillates and the pivot for the guide arm and/or the'distance between the yarn guide and the pivot for the guide arm. 7

Apart from its simplicity of construction the winding apparatus has the advantage that in a winding machine employing a plurality of spindles, the operation of each guide can be quite independent of the operation of any other guide, it being possible to start up any package irrespective of the state of wind of any other package, since the formation of the tapered ends is controlled solely by the individual package.

The invention will now be described in greater drawings, in which:

Figs. 1 and 2 show diagrammatically in end elevation and plan respectively mechanism according to the invention applied to the winding of cheeses; and Y Figs. 3-5 a form of mechanism adapted for the winding of cones;

Fig. 3 being an end elevation; Fig. 4 a front elevation partly in section; and Fig. 5 a plan. I Referring to Figs. 1 and 2, a package support I is arranged to rotate on its horizontal spindle 2 by any suitable means (not shown). Parallel to the spindle 2 is a reciprocating traverse bar 3 which has to and fro motion of amplitude a. imparted by any suitable cam or like means (not shown). Conveniently the traverse bar serves a plurality of packages, one other such package being shown at the bottom of Fig. 2. A pivot 4 is disposed on the side of the bar 3 remote from the package I at a point opposite the mean position of the bar 3. A lever 5 carried by the pivot 4 is slotted at 6 to be engaged by'a pin 1 carried by the bar 3, with theresult that the reciprocation of the bar 3 causes the outer end 8 of the lever 5 to swing about the pivot 4..

A guide arm 9 is vertically pivoted to the end 8 of the lever 5 for vertical swinging movement so as to enable its guiding end ID to rest by gravity on the yarn being woundon the support I. When winding commences the guide l0 rests on the support itself, and has an effective radius about the pivot 4 equal to the distance I), so that the swinging of the lever 5 gives the guide I!) an effective traverse equal to the distance c. When, however, the diameter of the package increases, the guide arm 9 is swung upwardly about its pivot 8, reducing the distance of the guide In from the pivot 4 to the amount d and giving the guide an effective traverse e of reduced amount. The ends of the cheese are thus tapered as shown at f. In its passage to the guide III the yarn ll may be controlled by a guide l2 near the pivot 4 and a guide l3 carried on the guide arm 9.

Referring to Figs. 3-5, a mechanism is shown in the form of a unit in which the package is provided with individual traverse mechanism operated by the package driving means. A tapered support for a tube 2| is mounted on a horizontal spindle 22 provided with a friction roller 23 resting on and driven by a friction roller 24. A pulley 25 Secured to the spindle 26 of the roller 24 provides for the driving of the package support 20. A worm 21 secured to the spindle 2B gears with a worm wheel 28 on a shaft 29 carrying a heart-shaped cam 30. A traverse bar 3| is reciprocated parallel to the spindle 22 by the cam 30, and causes a traverse rod 32 to swing about its pivot 33, the bar 3| being held against the cam 3|] by means of a spring 43. To the free end 34 of the rod 32 is pivoted a guide arm 35 provided with a guide 36 intended to rest against the surface of the yarn being wound on the tube 2|. Adjustable counter-weights 31 on the opposite side of the pivot 34 from the guide 36 enable the degree of pressure of the guide to be,

regulated, so that, notwithstanding that yarns of different denier may be wound and that therefore the tensionstherein may be different, the pressure giving the best build of package may be obtained and excessive pressure may be avoided. The yarn 38 proceeds to the guide 36 through a guide 39 carried by the rod 32.

When the guide 36 rests against the tube 2! it has its maximum effective radius about the pivot 33, and therefore a maximum traverse which is indicated by the distance h. As the size of the cone increases the radius of the guide 36 about the pivot 33 decreases, until the effective traverse of the guide is reduced to the distance g. The ends of the cone are thus tapered as shown at 7'. a

The outer package bearing 40 is free to be swung as shown at II to enable the package to be easily removed, a spring 42 serving to hold the bearing in operative position.

In both forms of apparatus shown in the drawings, the horizontal disposition of the package enables gravity to cause the, yarn guide to bear against the surface of the package. It will readily be understood, however, that the invention is applicable to packages disposed otherwise than hurlzontally, in which case appropriate means, e. g. a spring may be used to press the yarn guide against the surface of the package.

While the invention is applicable to the winding of all types of yarn and like materials it is especially suitable for use in the winding of lustrous or slippery materials, such as artificial filaments, since thick winding of such materials at the ends of a package usually leads to slippage of the materials with consequential unwinding difliculties, When wound according to the invention, however, even the most lustrous materials are formed into a compact package, the tapering ends of which effectively prevent any slipping or falling of the materials. Voluminous yarns and crepe yarns can also be wound into very satisfactory packages by means of the apparatus according to the invention.

Having described my invention what I desire to secure' by Letters Patent is:

1. In a yam-winding machine comprising a pivoted traverse rod and a guide arm oscillating therewith but pivotally mounted thereon, so as to bear against the surface of the package and to be capable of swinging progressively away from the plane in which the rod oscillates as the package diameter increases, a weighted lever secured to said guide arm so as to produce the desired degree of pressure on the surface of the package.

2. In a yam-winding machine comprising a pivoted traverse rod and a guide arm oscillating therewith but pivotally mounted thereon, so as to bear against the surface of the package and to be capable of swingi g progressively away from the plane in which the rod oscillates as the package diameter increases, a weighted lever secured to said guide arm so as to produce the desired degree of pressure on the surface of the package and a weight carried by said weighted lever that is adjustable along the length of said lever so that the degree of pressure on the surface of the package may be varied.

,3. In a yam-winding machine comprising a pivoted traverse rod and a guide arm oscillating therewith but pivotally mounted thereon, so as to bear against the surface of the package by its own weight and to be capable of swinging progressively away from the plane in which the rod oscillates as the package diameter increases, a weighted lever secured to and acting as a counterweight for said guide arm so as to produce the desired degree of pressure on the surface of the package.

4. In a yarn-winding machine comprising a pivoted traverse rod and a guide arm oscillating therewith but pivotally mounted thereon, so as to bear against the surface of the package by its own weight and to be capable of swinging progressively away from the plane in which the rod oscillates as the package diameter increases, a weighted lever secured to and acting as a counterweight for said guide arm so as to produce the desired degree of pressure on the surface of the package, said weightedlever carrying a weight that is adjustable along the length of said lever so as to vary the degree of pressure on the surface of the package.

' DONALD FINLAYSON. 

